Platen-release for type-writing machines.



0.- THIEME. PLATEN RELEASE FOB TYP WRITING MACHINES.

' APPLICATION FILED SBPT. 23, 1910.

i Patented Feb. 28, 191].

lll Illt 20 typewriting machine from its ordinary ro- 40 suitable screwsa collar portion 6 on the out- UNiTED sriirns PATENT onirica. OTTO THIEME, OF ST. LOUIS, MISSOURI, .A SSIGNOR -TO MOON-HOPKINS BILLING' MA- CHINE COMPANY, OF ST. '.|OUIS, MISSOURI, V.A CORPORATION .MISSOURI rLATEN-RELEASE For. rYraWRiTING MACHINES.

985,713. Specification f Letferslatent Patented Feb. 28, 191.1; l

Application led September 23, A1910. Serial No. 583,435. To cZZ whom it may concern.' to hold the segmental pieces 12 and 13 in po- Be it knownthat I, Orro THIEME, a citisition. zen of the United States, residing at St. Mounted within the bore of the platen is Louis, Missouri, have invented a certain the platen shaft divided into two parts 18 new and useful Improvement 'in Platen-Reand 19, the portion 18 extending through G0 leases for Type-Writing Machines, of which the platen nearly to the end having the ratchet wheel 9 thereon, and the portion 19 lthe following is a full, clear, and exact de scription, such as will enable others skilled abutting against 18 extends through a bearing 20 on t-hecarriage to'the outside of the i 'carriage having a hand knurled wheel .21 65 fixed thereon.' Outside the bearing 20 is also xedly mounted on the shaft 19 a second ratchet wheel 22 an inside the bearing 'is iixedly mounted on the shaft 19 a col-v lar 23 having pins 24 engaging the proper 7 0 openings in the ratchet 9. This' allows of" the portion 19 of the shaft, having beenv l0 and use the saine, reference being had 'to the accompanying drawings, forming part of thisspecification, in which-` Figure 1 is a general sectional view of my improved device. Fig. 2 is a sectional View 15 taken on the line u a; of Fig. 1. Fig. 3 is a sectional view taken on the line -b of Fig.

Fig. 4 is a detail of the platen shaft.' he invention relates to .an/improvement in a device for releasing: the platen of a through a portional spacing or more than i the ordinary interval between the lines of printing. For example,.if it is desired to 25 half space between certain lines of the coml e spacing four-fold this may be accomplished with the use of my improved device without effect-ing in any way theadjustinents of the ordinary 4 at 25 for' the reception of steel balls 26 and 27, which balls are adapted to engage the interior of the segments 12 and 13. rAs 80 indicated in Fig. 1 more especially it will be seen Ythat thevslots 25 are 1ncl1ned,'the 1n spacing mechanism.

Referring to the drawings, 1 `indicates the body of the platen having -the. usual ruber impression surface 2, and open center-3she' opening or bore in the center of the platen is made of two different diameters, one extending nearly to the opposite end 4 l of the platen,and the other with larger diameter 5 continuing to the end. l

At one end of the platen is attached by 4 and 5. Adjacent the other end `of the shaft and adapted to always engage the pin l 8 by means of a slot 32 in a out in the periphery thereof, is a disk 83. p i 34 indicates the bearing for theplaten 951 sha opposite the bearing 20, and 35 is a linurl hand wheel attached to the 4straft.

lThe ratchet wheels 9 and 22 are' o 'ordi. nary construction in typewriterplatens,A and are acted upon by suitable devices to rotate 4100 `the platen to properly space the lines.

sideofthe platen, and having a portion 7 p extending into the bore 4 in the platen, with an elongated pin 8 projecting from the face thereof. At, the' other end of the platen is mounted a ratchet wheel 9 on an elongated hub portion 10 extending within the bore 5 o the platen. Between the end of the The hub portion 10 on the ratchet 9 is platen and the ratchet 9 is vmounted a collar normally clamped to the' platen shaft 18 11. At the end of the portion 10 opposite which'through the fixed .sleeve 33 and pin 8 the ratchet wheel is mounted two segmental will produce the rotation of the platen 105 l pieces l2 and 13, being cut away at the centhrough the ratchets 9 and 22; This normal 'ter to form a substantially square opening clamping action is due to the fact that the' 14 alid being grooved at 15 on its periphery balls 26 and 27 roll upon the inclined slots for the reception of a split spring ring 16. 25 in. the shaft 18 as this shaft 1s pushed to A. closure plate 17 is attached to the body 10 the right by means of the spring 29, and byr 11o such movement the segmental pieces 1 2 and 13 are separated tov produce a tension in the the shaft, spring actuated (sect-ions mounted split ring 16 which acting.' upon the balls in the hub,`balls mounted in the grooves` of tends to clamp the hub portion tothe the shaft, and bearing against the spring acshaft 18. If, however, the shaft 18 be moved tuated sections, spring actuated means tend- 'sired position,

ing to clamp the operating means to the shaft through the rolling action of the balls, and a member fast on the shaft adapted to engage a fixed'portio'n on the platen.

" 3. In a device of the character described, a rotating platen, a grooved shaft mounted to the left in Fig. 1 the balls 26 and 27- roll down the incline in the slots 25, thereby lessening the tension in the split ring 16, and reducing to nothing the\clainping action be-. tween the hub portion 10 and the shaft. This disconnects the ratchet driving mechanism from the shaft 18, and if the hand wheel in the platen, operating means having a hub 35 be rotated the platen 1 may be moved, port-ion projecting over the grooves in the independent of such mechanism to any deshaft, spring-actuated sections mounted in this being the hub, balls mounted inthe grooves in-the through the interconnection of the pin8 and shaft and bearing against the spring-actutlie sleeve 33 fast to the shaft 18. ated` sections, and sprin -actuated -means 1S moves loosely throughl the portion tending to clamp the operating means to the It is to be understood that I do not wish shaft through the rolling action of the balls. to limit my improvement to its use in conf1. In a de'vicaof the' character described, nection with a typewriter platen as it may be a rotating. member, al shaft mounted inthe advantageously used in connection with any member, an operative part having a portion rotating device which is positively operated, extending over the shaft, said pait having and which it is desired vto rotate independtwo oppositely arranged sections loosely ent of its operating means.

. mounted therein, and a split spring ring sur- I am fully aware that changes may be beinade in 'the construction, arrangement and rounding said sections, balls mounte tween said spring-operated sections and the combination of the various parts of my device without departing from the 'spirit o f my invention, the scope Lof which is indibetween the Spring sections and the shaft. cated in the attached ClLlIIlS- 5. In a device of the character described, I claim: a rotating member provided with a ping a shaft mounted in the member, an operative part having a hub extending over the shaft, spring-operated sections mounted. in said hub, balls located between said springfoper- 1. In a device of the character described, a

rotating member, a shaft mounted in the member, an operative part having a portion extending over the shaft, spring operate sections mounted in said latter portion, balls ated members and the shaft, and a collar mounted between said spring operate mein? having an opening adapted to register with the in on the rotating member.

In testimony whereof I hereunto affix my signature in the presence of two witnesses,

this 12th day of eptember,

OTTO THIEME.

bers and the shaft, and means tending to clamp the operative member to the shaft through the clamping action of the balls acting upon the spring actuated members in the operative mechanism and the shaft.

.2. In a device of the character described, IVitnesses: a -rotating platen, a grooved shaft mounted J. LIFT, M. P. SMITH.

in the platen, an operating means having a l for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

Copies' of this patent may be obtained hub portion projecting over the grooves in shaft, and means whereby the shaft may be A moved to cause clamping action of the balls 

